中国电机工程学报2017，Vol.37Issue(24)：7294-7303,10.DOI:10.13334/j.0258-8013.pcsee.162646
不对称电网电压下基于降阶矢量谐振器的MMC-HVDC直接功率控制策略
Direct Power Control Strategy Based on Reduced Order Vector Resonant Controller for MMC-HVDC Under Unbalanced Grid Voltages
梁营玉1
作者信息
- 1. 中国矿业大学(北京)机电与信息工程学院,北京市海淀区 100083
- 折叠
摘要
Abstract
A novel instantaneous power was introduced and then a deep comparison between traditional instantaneous power and novel instantaneous power was done. A generalized power model based on novel instantaneous power was established. The direct power control strategy was proposed, which is based on novel instantaneous power and proportional integral plus reduced order vector resonant controller (PI-ROVRC). PI was used to control the dc component of instantaneous power while ROVRC was used to eliminate the double line-frequency positive-sequence ripples. The whole control structure was designed and a deep analysis of ROVRC on the control performance and the robustness for model parameters was carried out. In addition, the implement method of ROVRC was described in detail. The proposed control strategy removes current inner loop and can control active power and reactive power simultaneously. Furthermore, compared with traditional power control strategy, the calculation of power compensation term and the extraction of negative-sequence voltage and positive-sequence current are both avoided which result in a simpler control structure. Simulation results validate that the proposed control strategy can achieve a good control performance under various conditions, i.e., balanced grid voltages, unbalanced grid voltages, changed grid frequency and arm inductance parameter deviation.关键词
模块化多电平换流器/降阶矢量谐振器/新型瞬时功率/电网电压不对称Key words
modular multilevel converter (MMC)/reduced order vector resonant controller (ROVRC)/novel instantaneous power/unbalanced grid voltages分类
信息技术与安全科学引用本文复制引用
梁营玉..不对称电网电压下基于降阶矢量谐振器的MMC-HVDC直接功率控制策略[J].中国电机工程学报,2017,37(24):7294-7303,10.
